| CdSe/ZnS量子点荧光猝灭法测定农药甲胺磷 |
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| 引用本文： | 黄珊,马建强,张丽霞,董明月,李雪华,罗秋玲.CdSe/ZnS量子点荧光猝灭法测定农药甲胺磷[J].湖北大学学报(自然科学版),2013(3):344-349. |
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| 作者姓名： | 黄珊 马建强 张丽霞 董明月 李雪华 罗秋玲 |
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| 作者单位： | 广西师范学院化学与生命科学学院,广西南宁,530001 |
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| 基金项目： | 国家自然科学基金，广西南宁市科学研究与技术开发项目 |
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| 摘 要： | 基于农药甲胺磷对CdSe/ZnS量子点荧光猝灭的现象,建立了一种简单快速测定农药甲胺磷的新方法.在最佳实验条件下,CdSe/ZnS量子点的荧光猝灭程度与甲胺磷浓度在4.72×10-7～7.08×10-6 mol/L范围内呈线性关系,相关系数为0.998 8,检出限为2.5×10-7 mol/L.本法已成功用于大米及莴苣叶菜中农药甲胺磷残留的检测,加入回收率在91.7%～106.7%之间.利用紫外-可见光谱及透射电子显微镜技术,探讨了甲胺磷对CdSe/ZnS量子点荧光的猝灭机理.
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| 关 键 词： | CdSe ZnS量子点 荧光猝灭 甲胺磷 |
Fluorescence quenching method for the determination of methamidophos using CdSe/ZnS quantum dots |
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| HUANG Shan
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MA Jianqiang
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ZHANG Lixia
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DONG Mingyue
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LI Xuehua
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LUO Qiuling.Fluorescence quenching method for the determination of methamidophos using CdSe/ZnS quantum dots[J].Journal of Hubei University(Natural Science Edition),2013(3):344-349. |
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| Authors: | HUANG Shan MA Jianqiang ZHANG Lixia DONG Mingyue LI Xuehua LUO Qiuling |
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| Institution: | (College of Chemistry and Life Science,Guangxi Teachers Education University,Nanning 530001,China) |
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| Abstract: | A simple and rapid method for methamidophos determination was developed based on the fluorescence quenching of CdSe/ZnS quantum dots by methamidophos.Under the optimized conditions,the linear range of CdSe/ZnS QDs fluorescence intensity versus the concentration of methamidophos was 4.72×10-7—7.08×10-6 mol/L,with a correlation coefficient（R） of 0.998 8 and a limit of detection of 2.5×10-7 mol/L.The proposed method has been applied to the determination of methamidophos in rice and lettuce leaves with standard recoveries of 91.7%—106.7%.The fluorescence quenching mechanism was further investigated by using UV-vis absorption spectra and TEM technique. |
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| Keywords: | CdSe/ZnS Quantum dots fluorescence quenching methamidophos |
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